<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/HOME' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" :align-center="true">
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <!-- tab区域 -->
        <el-tabs v-model="activeIndex" :tab-position= 'tabPosition' :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
              <!-- 表单内容 -->
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <el-cascader
                  v-model="addForm.goods_cat"
                  expand-trigger="hover"
                  :options="catelist"
                  :props="props"
                  @change="handleChange"></el-cascader>
              </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="item in manyTabDate" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox v-for="(cb, i) in item.attr_vals" :key="i" :label="cb" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabDate" :key="item.attr_id">
              <!-- 复选框 -->
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action图片上传地址 -->
            <el-upload
            :action="uploadUrl"
            :on-preview="handlePreview"
            :on-remove="handleRemove"
            list-type="picture" :headers="hsaderObject" :on-success="handleSuccess">
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <quill-editor v-model="addForm.goods_introduce">

            </quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog
    title="图片预览"
    :visible.sync="dialogVisible"
    width="50%">
    <img :src="previewPath" class="previewImg">
  </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data () {
    return {
      //  步骤条当前状态
      activeIndex: 0,
      tabPosition: 'left',
      //  商品分类列表
      catelist: [],
      //  添加数据的表单对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //  商品所属分类
        goods_cat: [],
        //  图片上传路径
        pics: [],
        attrs: [],
        //  商品详情描述
        goods_introduce: ''
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      //  动态参数列表
      manyTabDate: [],
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      //  静态属性列表
      onlyTabDate: [],
      previewPath: '',
      //  预览图片对话框
      dialogVisible: false,
      //  图片上传组件的请求头
      hsaderObject: {
        Authorization: window.sessionStorage.getItem('token')
      },
      //  级联选择器配置
      props: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      }
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品app
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error('获取商品数据失败')
      this.catelist = res.data
      console.log(this.catelist)
    },
    // 级联选择器发生变化
    handleChange (value) {
      console.log(value)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    // Tabs切换则调用
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    // Tabs点击事件
    async tabClicked () {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) return this.$message.error('获取数据失败')
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTabDate = res.data
        console.log(this.manyTabDate)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) return this.$message.error('获取数据失败')
        this.onlyTabDate = res.data
        console.log(this.onlyTabDate)
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.dialogVisible = true
    },
    // 处理移除图片的操作
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => {
        x.pic = filePath
      })
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传事件
    handleSuccess (response) {
      console.log(response)
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单信息！')
        }
        // 处理动态参数和静态属性
        this.manyTabDate.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTabDate.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        // 深拷贝解决 this.addForm中goods_cat为数组  要求是字符串的问题
        // lodash cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        // 添加
        form.goods_cat = form.goods_cat.join(',')
        console.log(form)
        // 发起请求添加商品
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败')
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang='less' scoped>
.el-checkbox {
  margin-right: 10px !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin: 20px 100px 0 0;
  float: right;
}
</style>
